Practice bomb



8 Feb. 22, 1938. s. P. HUFF ET m.

PRACTICE BOMB ,Filed April 21, 1937 /6' inventors Sargent 'FLHuff' IArthur Adelman Attorney Patented Feb. 22, 1938 UNITED STATES PATENTOFFICE mac'ncn BOMB Application April 21, 1937, Serial No. 138,180

2 Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370O. G. 757) The invention described herein may be manufactured and usedby or for the Government for governmental purposes, without the paymentto us of any royalty thereon.

The subject of this invention is a practice bomb.

The purpose of the invention is to provide a practice bomb with aninexpensive means for indicating or signalling. the position of itsland'- ing and to so arrange the structure that the signalling means maybe conveniently housed in a barrel through which sand or other inertmaterial is introduced into the bomb.

A further object is to construct the signalling means as aunit so thatit may be easily and quickly applied to the tail of the bomb.

To theseand other ends, the invention consists in the construction,arrangement and combination of elements described hereinafter andpointed out in the claims forming a part of this specification.

A practical embodiment of the invention is 11- lustrated in theaccompanying drawing, wherein: Fig. 1 is a view in elevation with partsin section of a practice bomb constructed in accordance with theinvention.

Fig. 2 is an enlarged longitudinal sectional view of the outer portionof the signalling unit.

Fig. 3 is a plan view of Fig. 1.

Referring to the drawing by characters of reference, there is shown apractice bomb comprising a cylindrical body 5 having a rounded nose orfront end 6 and a rear end I which is formed with a neck 8. A barrel 9is fixed on the neck 8, its outer end supported by a conical tail-piecel which is secured to the periphery of the rear end I. The tail-piececarries a conventional fln assembly II. The bomb is filled with an inertand inexpensive material such as sand l2 which is introduced through themouth of the barrel 9.

The unit for indicating or signalling the position of impact, of thebomb comprises a container l3 which is insertable in the barrel 9 and issupported therein by having its inner end It rest on the rim of the neck9. When the container is thus supported, its outer end I is disposedwithin the barrel 9 and below resilient lugs l6l6 which are formed fromthe wall of the barrel and are adapted to hold the container against re-50 moval.

A flash tube I I, passing through the central part of the outer end I!and fixed thereto, extends into the container and on its lower or innerend it carries a disc l8 which is spaced from the 55 inner end l4 0! thecontainer. A charge l9 of black powder is placed between the disc l8 andinner end It and a charge 29 of an indicating material, such as powderedtale, is placed between the disc and the outer end IS. A cartridge 2| isplaced in the outer part of the tube with its rim resting on the rim ofthe tube.

A firing pin tube 22 fixed to the outer end I5 01' the container l3 andsurrounding the'outer portion of the flash tube l'l houses a firing pin23 which is held in place against a cotter pin 24 by means of a spring25 which is confined between the firing pin and a removable bolt 26. Thebolt extends laterally through the tube 22 between the firing pin andthe cartridge and has its outer portion disposed in a housing 21 fixedto the tube 22. A spring 28 for ejecting the bolt is confined betweenthe tube 22 and a head 29 on the bolt. The bolt is held against theaction of the spring by means of a wire 30 passing through the head 29and housing 21. This wire is associated with the launching apparatus ofaircraft, as is well understood in the art, and is withdrawn from thebolt when the bomb is dropped to permit ejection of the bolt.

When the bolt is withdrawn from the path of the firing pin the spring 25engages the base of the cartridge and holds the firing pin away from thecartridge. On impact the firing pin moves forwardly to fire thecartridge and the flash from the cartridge is directed throughthe tubeIT to set off the charge of black powder l9 which discharges thepowdered talc 20. The tale forms a dense cloud which is clearly visibleto an observer in the aircraft.

We claim,

1. A practice bomb including, a body adapted to contain an inertmaterial, a barrel on the rear of the body through which inert materialis introduced into the body, a container housed in the barrel and havinga flash tube, an expelling charge in the inner part of the container, acharge of powdered material in the remaining part of the container, acartridge in the outer part of the flash tube, a firing pin tube on thecontainer, a firing pin in said tube, an arming bolt interposed betweenthe cartridge and firing pin and means for electing the arming bolt whenthe bomb is launched.

2. A practice bomb including a body adapted to contain an inertmaterial, a barrel on the rear of the body through which inert materialis introduced into the body, a container housed in the barrel and havinga flash tube, an expelling charge in the inner part of the container, acharge of powdered material in the remaining part of the container, acartridge in the outer part oi. the flash tube, and means for firing thecartridge.

SARGENT P. HUFF. AR'I'HUR. ADELMAN.

